|
| |
|
|
A199532
|
|
Number of -n..n arrays x(0..4) of 5 elements with zero sum and no two consecutive zero elements
|
|
1
|
|
|
|
32, 320, 1324, 3734, 8470, 16682, 29750, 49284, 77124, 115340, 166232, 232330, 316394, 421414, 550610, 707432, 895560, 1118904, 1381604, 1688030, 2042782, 2450690, 2916814, 3446444, 4045100, 4718532, 5472720, 6313874, 7248434, 8283070
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
Row 5 of A199530
|
|
|
LINKS
|
R. H. Hardin, Table of n, a(n) for n = 1..200
|
|
|
FORMULA
|
Empirical: a(n) = (115/12)*n^4 + (115/6)*n^3 + (41/12)*n^2 - (1/6)*n
|
|
|
EXAMPLE
|
Some solutions for n=5
..2....1....3...-5....1....0....5....5...-3....4...-5....1...-5...-2....0...-1
.-5...-2....4....4....4...-1...-3....0...-1...-3....1....0....3....3....1....5
.-4...-2...-4....1....3....1...-3...-2....2...-5....2...-5...-2...-3...-3....3
..3....4...-1...-2...-5....3...-1...-1...-3...-1....2....4...-1...-2...-3...-3
..4...-1...-2....2...-3...-3....2...-2....5....5....0....0....5....4....5...-4
|
|
|
CROSSREFS
|
Sequence in context: A061958 A050279 A096764 * A165004 A173952 A165008
Adjacent sequences: A199529 A199530 A199531 * A199533 A199534 A199535
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
R. H. Hardin Nov 07 2011
|
|
|
STATUS
|
approved
|
| |
|
|
